Floor and the process of laying the same



April 1930. L. s. WILBUR 1,754,537

FLOOR AND THE PROCESS OF LAYING THE SAME Filed Nov. 5. 1927 .EU 6%: lawnamafi. may

Patented Apr. 1 5, 1930 UNITED STATES PATENT OFFICE LAWRENCE S. WILBUR, 0F EVANSTON, ILLINOIS, ASSIGNOR 'I'O JOHNS-MANVILLE CORPORATION, A CORPORATION OF NEW YORK FLOOR AND THE PROCESS OF LAYING THE SAME Application filed November 3, 1927. Serial No. 230,764.

Bituminous concrete shrinks considerably in cooling from the relatively high temperature (usually about l00 F.) at which it is laid; and, in so doing, pulls away from the walls or other adjoining surfaces. lVhen it is attempted to make a cove or molding at the edge, the raised portion tends to lean and move inwardly increasing the width of the crack at the top and destroying the usefulness and effect of the cove or molding.

The principal object of this invention is to overcome these difiiculties and enable cheap labor to produce acceptable flooring.

Fig. 1 is a horizontal sectional View illustrating an intermediate stage in the process of laying a bituminous concrete floor in a car;

Fig. 2 is a sectional view taken on the line 22 of Fig. 1 illustrating another intermediate stage in the process;

Fig. 3 is a sectional view similar to Fig. 2 illustrating the finished structure; and

Fig. a is an end View of a float suitable for use in laying the border or molding.

But these specific illustrations and the correspondingly specific descriptions are used for the purpose of disclosure only, and are not intended to impose limitations on the claims.

The car is indicated generally at 10, in cluding a foundation floor structure 11, exterior walls 12, and partition walls 13.

The preferred procedure may be divided into steps as follows: First, install temporary margins, here illustrated as formed by strips 14, located adjacent to the Walls and spaced therefrom by blocks 15, both strips and blocks being temporarily made fast in. Second, lay the body portion of the bituminous concrete 16 (Fig any suitable manner.

2) within the area enclosed by the temporary margins and finish to suit conditions. Third, after the concrete has cooled to such an extent that there will be no appreciable shrink 7 age, remove the temporary margins. Fourth,

insert hot bituminous concrete in the marginal space, generally indicated by 17 in Fig. 2, tamp it down and bring to an approximate surface. Fifth, apply a float to the surface and continue rubbing with considerable pres sure until substantially all shrinkage has taken place.

When the border is to include a cove or molding, such as illustrated at 18 in Fig. 3, an excess of concrete should be inserted and the float should be profiled as indicated at 19- to correspond with the desired form of cove or molding.

It is of advantage to lay the border in relatively short lengths in order. that the float may be applied before any appreciable cooling has taken place for in this Way it may be forced into intimate contact with the adjoining concrete, the wall, and the foundation floor surface, and thus made to form an intimate bond with those surfaces. In addition, any excess of concrete may be worked towards the unlaid portion of the marginal space.

The border may, of course, be made of a different material, in which case theadjacent surface of bituminous concrete and/or the surface of the foundation floor and wall may be primed with shellac, glue or cement according to the nature of the material to be made fast.

The bituminous concrete may, of course, include a variety of materials in the aggregate, but wherever possible, it is preferred to use a cellular material for the large aggregate in order to reduce the weight and increase the sound deadening and insulating properties. However, the particular constituents of the bituminous concreteare not the essence of this invention.

I claim as my invention:

1. The process of laying bituminous concrete which includes installing temporary margins, laying the flooring up to the temporary margins and allowing it to cool and shrink, removing the temporary margins and laying the marginal portions of the flooring, and subjecting them to pressure during cooling and shrinking.

2. The process of laying bituminous concrete which includes installing temporary margins, laying the flooring up to the temporary margins and allowing it to cool and shrink, removing the temporary margins and and acting upon them with a float during cooling and shrinking.

3. The process of laying bituminous concrete which includes installing temporary margins, laying the flooring up to the temporary margins and allowing it to cool and shrink, removing the temporary margins and laying the marginal portions of the flooring a small section at a time and acting upon each section with a float during cooling and shrinkmg.

4. The process of laying bituminous concrete flooring on a sub-floor structure and against a wall. which includes installing a temorary margin on the sub-floor structure adjacent to the wall, laying the concrete up to the temporary margin and allowing it to cool and shrink, removing the temporary margin, inserting hot concrete between the wall and the adjacent laid concrete and subjecting it to pressure during cooling and shrinking.

5. The process of laying bituminous concrete flooring on a sub-floor structure and against a wall which includes installing a temporary margin on the sub-floor structure adjacent to the wall, laying the concrete up to the temporary margin and allowing it to cool and shrink, removing the temporary margin, inserting hot concrete between the wall and the adjacent laid concrete and acting upon it with a float during cooling and shrink- The process of laying bituminous concrete flooring on a sub-floor structure and against a wall which includes installing a temporary margin on the sub'floor structure adjacent to the wall, laying the concrete up to the temporary margin and allowing it to cool and shrink, removing the temporary margin, inserting an excess of hot concrete between the wall and the adjacent laid concrete and rubbing it with a float during cooling and shrinking.

The process of laying bituminous concrete flooring on a sub-floor structure and against a wall which includes installing a temporary strip on the sub-floor structure adjacent to the wall, laying the concrete up to the temporary strip and allowing it to cool and shrink, removing the temporary strip, inserting an excess of hot concrete between the wall and the adjacent laid concrete and subjecting it to pressure during cooling and shrinking for intimately uniting the two bodies of concrete and forming a bond between the concrete and the walls.

In testimony whereof I affix my signature.

LAWRENCE S. VVILBUR. 

